The Siemens 3VA1080-3ED36-0JC0 is a SENTRON molded case circuit breaker (MCCB) rated for 80 A at 40 °C, with a breaking capacity of 75.6 kA at 240 V and 52.5 kA at 415 V. It is a 3-pole unit designed for line protection, fitted with a shunt trip release and two HQ auxiliary switches.
Breaking capacity and selectivity
The 75.6 kA breaking capacity at 240 V and 52.5 kA at 415 V give this MCCB headroom for high-fault installations, typically found on transformer secondaries or large motor control centers. The 32 kA rating at 440 V and 7.5 kA at 690 V define the upper voltage limits for fault interruption. Selectivity with downstream breakers depends on the trip curve coordination; the 80 A continuous rating at 40 °C is the thermal benchmark for sizing upstream protection.
Thermal derating and ambient range
The 80 A rating holds steady from 40 °C through 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. Operating ambient spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. Panel builders should account for the 19.2 W maximum power loss when calculating enclosure heat rise.
Physical fit and panel integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The 3-pole footprint matches standard Siemens 3VA panel cutouts and busbar spacing. The shunt trip (STL) and two auxiliary switches are factory-installed, so no field assembly of accessories is needed.